21113223201020 has 24 divisors (see below), whose sum is σ = 44338316824368. Its totient is φ = 8445184880000.

The previous prime is 21113223200987. The next prime is 21113223201043. The reversal of 21113223201020 is 2010232231112.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 21113223200983 and 21113223201001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4856306 + ... + 8112345.

It is an arithmetic number, because the mean of its divisors is an integer number (1847429867682).

Almost surely, 2^{21113223201020} is an apocalyptic number.

21113223201020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21113223201020 is an abundant number, since it is smaller than the sum of its proper divisors (23225093623348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21113223201020 is a wasteful number, since it uses less digits than its factorization.

21113223201020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13050061 (or 13050059 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21113223201020 its reverse (2010232231112), we get a palindrome (23123455432132).

The spelling of 21113223201020 in words is "twenty-one trillion, one hundred thirteen billion, two hundred twenty-three million, two hundred one thousand, twenty".